Desulfurization process using a combination of a suspension bed and a fixed bed

摘要

A desulfurization process which uses both a suspension bed and a fixed bed is disclosed herein. In particular, the desulfurization slurry is mixed with a hydrogen sulfide containing gas to obtain a first mixture, and the first mixture passed into a suspension bed reactor from bottom to top, while controlling the first mixture to have a dwell time of 5-60 minutes in the reactor. A second mixture obtained by the reaction is subjected to gas liquid separation to produce a gas phase, and the gas phase is feed into a fixed bed reactor for a second desulfurization which produces purified gas. Advantageously, sulfur content in the hydrogen sulfide containing gas may be reduced from 2.4-140 g/Nm3 to 50 ppm or less by using a suspension bed, and the sulfur content may be even further reduced to less than 10 ppm in conjunction with a fixed bed.